Heat source apparatus



FIG. 1 is a front and right side perspective view of a heat source apparatus according to the novel design.

FIG. 2 is a front view of a heat source apparatus according to the novel design.

FIG. 3 is a right side view of a heat source apparatus according to the novel design.

FIG. 4 is a left side view of a heat source apparatus according to the novel design.

FIG. 5 is a top view of a heat source apparatus according to the novel design.

FIG. 6 is a rear view of a heat source apparatus according to the novel design; and,

FIG. 7 is a bottom view of a heat source apparatus according to the novel design.

The broken lines included in the drawings depict elements that are not part of the claimed design. 

CLAIM The ornamental design for a heat source apparatus, as shown and described. 